Window hinge and guide link



R. ZIESMER WINDOW HINGE AND GUIDE LINK Feb. 19, 1957 Filed June 5, 1953 M w m m ilnited States Patent Gfiice Patented Feb. 19, 1957 This invention relates to hinges for casement windows. More particularly the invention relates to casement windows for a building which are hinged to swing outwardly so that in its outward position a wide space is provided at each side of the window to permit both sides of the window to be cleaned from the inside of the building.

In my copending application Serial No. 354,966, filed May 14, 1953, for a casement window is described a window hinged in a jamb with guide arms at the top and bottom of the window to facilitate the opening and closing of the window and to make it steady and strong. The hinges for this window are designed to provide a wide space at each side of the window in its open position, and in order to use guide arms for the window it is necessary to make the guide arms yieldingly adjustable in length to permit the necessary hinge movement for opening and closing the window.

I have now discovered a hinge construction for casement windows by which guide arms for the top and bottom of the window may be connected by fixed pivots between the window and the jamb and permit the window to move freely and easily from closed to open position and vice versa and still hold the window steady.

The primary object of the present invention is to provide a hinge construction for casement windows when using fixed length guide arms between the top and bottom of the Window and the window jamb by which the window may be moved with a smooth, steady movement for opening and closing, and leave a wide space between each side of the window and the jamb when the window is open.

Another object of the invention is to provide a hinge construction for casement windows using fixed length guide arms between the top and bottom of the window and the window jamb by which the window may be moved with a smooth, steady movement during opening and closing and be definitely retained in a desired open position.

With these and other objects in view, the invention consists in the hinged mounting of casement windows in a window jamb as hereinafter illustrated and described and particularly defined in the appended claims.

The various features of the invention are illustrated in the accompanying drawings in which:

Fig. 1 is a front elevational view of a casement window in a jamb showing the appearance of the hinges of the present invention on the window;

Fig. 2 is a perspective view of the upper portion of a easement window taken from the inside, showing the mounting of the guide arms and hinges for supporting the window to swing in the jamb; v

Fig. 3 is a top plan view of a window hinged in accordance with the present invention to swing outwardly in a window jamb and provide a wide space at each side of the window for cleaning it from the inside;

Fig. 4 is a detail front view of the three pivot hinge shown in Fig. 3; and

Fig. 5 is a sectional view taken on the line VV of Fig. 3, showing the detent for retaining the window in various open positions.

The present invention is directed particularly to the hinge mounting of a metal casement window which is mounted in :a metal frame. The metal frame is preferably made of an aluminum alloy.

Referring to Fig. 1, the window sash 10 is mounted in a window frame 12. The window frame is made up of a series of connected outer rails 14, which rails have an outwardly-projecting flange 16 arranged to engage the flat face of a flange 18 surrounding the frame. When the window is closed as shown in Fig. 1, the back face of the flange 16 makes a surface contact with the flange 18 to tightly close the window sash. The window sash'is normally held in closed locked position by a lock 20.

The window sash 16 is mounted in the frame by means of a compound hinge 22 and guide rail 24 which are mounted at the top and the bottom of the window sash and frame. The hinge mounting at the top and bottom of the window isthe same, so that only one hinge and guide rail is illustrated and described hereafter.

Referring more particularly to Figs. 2, 3 and 4, the compound hinge 22 is composed of a frame mounted arm 26, a sash mounted arm 28, and an intermediate connecting arm 30. The arm 26 is pivoted to the top rail 32 of the frame by means of a vertical pivot 34. A portion of the arm 26 extends through a slot 36 in the rail 32, so that a flat face 38 on the back of the arm will rest against a flange 40 on the rail 32 when the sash is in closed position. The sash arm 28 (Fig. 2) is attached to a vertical rail 42 of the window sash by means of rivets, and has a vertical pivot hinge joint 44 by which it is connected to the intermediate arm 30. The arm 30 is in the form of an angle with one part of the anglehaving a vertical pivotal connection 46 with the arm 38.

To make the sash steady and to cause it to move into and out of closing position in the window frame, the guide arms 24 are pivotally connected with a midportion of the window rail 14 by a fixed pivot 48, and to the rail 32 of the frame by a fixed pivot 50. The length of the arm 24 is fixed and the pivots are fixed so that it is necessary for the pivots 34, 44 and 46 of the hinge to provide the necessary movement to carry the sash from closed position as shown in Fig. 1 to the open position in Fig. 3. In moving from the position shown in Fig. l to the position shown in Figs. 2 :and 3, the hinge moves on each of the three vertical pivots which allows the window sash to move to a substantially right-angular position with reference to the frame when the window is open. At this time the vertical rail of the window sash is separated from the jamb by a substantial distance so that the arm of a person may extend through the space between the window and the jamb for cleaning the window from the inside of a building.

When the window sash is moved to an open position, it is desirable that it should be fixed in a desired position so that the amount of opening of the window may be adjusted. To accomplish this, a semi-circular segment 52 is attached to the rail 14 of the sash immediately below the guide arm 24. The segment is formed with the vertical pivot 48 as a center, so that a spring-pressed detent 56 (Fig. 5) which is mounted in the guide arm 24 will register with the depressions 58 in the segment. The detents may have such a frictional contact with the segment as to act to hold the window in any desired position. The depressions 58 in the top and bottom segments may be arranged so that the window may be held in substantially any desired adjusted position.

It will be noted that the pivot 34 of the hinge 38 is offset a substantial distance from the edge of the vertical rail 42 of the sash so that when the hinge is moved into the position shown in Figs. 2 and 3, the hinge rail of the sash will be spaced a substantial distance from the jarnb rail (five to eight inches) to position the window toward the mid portion of the frame opening. The length of the hinge arms 26 and 30 may vary in order to provide the desired space between the jamb and the window' sash when it is open, and the arms 2.4 act to rigidly hold the window sash in its open position so that it will be steady and move smoothly.

The preferred form of the invention having been thus described, what is claimed as new is:

1. The combination comprising a window frame having verticai and horizontal rails forming a window opening, a window sash fitted in the opening having vertical and horizontal rails, a compound hinge comprising an arm member pivoted at one end and to the window frame and having frame contacting surfaces thereon for limiting its swing to an arc of 90 from a position normal to the plane of the window when the sash is closed to a position parallel with the plane of the window when the sash is opened, said compound hinge comprising also a link pivoted at one end to a vertical rail of the sash and at its other end to the free end of said arm member, said compound hinge members overlying one another when the sash is closed and being in substantial alignment endto-end when the sash is opened whereby the rail of the sash to which the link is pivoted moves laterally toward the vertical center line of the window frame as the sash opens, and a guide link for effecting such operation of the hinge and sash having one end pivotally connected to a horizontal rail of the sash intermediate the two side rails and its other end pivotally connected to a horizontal rail of the frame intermediate the vertical center line of the frame and the side of the frame remote from the compound hinge.

2. The combination defined in claim 1 wherein there is a segment on the sash concentric with the pivot where the guide link connects with the sash, said segment extending over the link and having depressions therein, and a spring detent on the link yieldably bearing against the segment for releasably engaging in the depressions to hold the sash in various positions to which it may be moved.

References Cited in the file of this patent UNITED STATES PATENTS 325,333 Flagstad Sept. 1, 1885 2,200,692 Fairley May 14, 1940 2,248,337 Carroll July 8, 1941 FOREIGN PATENTS 288,046 Germany Oct. 16, 1915 189,116 Great Britain Nov. 8, 1923 770,550 France July 2, 1934 602,274 Great Britain May 24, 1948 

